[FIX] Adjusting bam2roi to new stream module.
[FEATURE] Adjusting roi_io module and adding RoiFile.
[FIX] Further advances in adjusting ngs_roi to new stream module.
[FIX] Adjusting roi_plot_thumbnails to new stream module.
[FIX] Using file format extension functions.
[FEATURE,FIX] Adjusting ngs_roi to new stream module.
Merge pull request #49 from holtgrewe/feature/stream/adjust-ngs_roi

Adjusting ngs_roi to new stream module.